chore(changelog): Add development dependency for conventional-changelog

Author: toupeira

omniauth-saml.gemspec

@@ -18,6 +18,7 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'rspec', '~>3.4'
   gem.add_development_dependency 'simplecov', '~> 0.11'
   gem.add_development_dependency 'rack-test', '~> 0.6', '>= 0.6.3'
+  gem.add_development_dependency 'conventional-changelog', '~> 1.2'
 
   gem.files         = ['README.md', 'CHANGELOG.md', 'LICENSE.md'] + Dir['lib/**/*.rb']
   gem.test_files    = Dir['spec/**/*.rb']